Influencia de factores endógenos (edad y sexo) en los niveles de biomarcadores de estrés oxidativo en alcatraz (Morus bassanus).
- Villalba-Álvarez, L.M. 1
- García-Muñoz, J. 1
- Martínez-Morcillo, S. 1
- López-Beceiro, A. 2
- Fidalgo, L.E. 2
- Soler, F. 1
- Míguez-Santiyán, M. P. 1
- Pérez-López, M. 1
- 1 Universidad de Extremadura, España
- 2 Universidad de Santiago de Compostela, España
ISSN: 0212-7113
Ano de publicación: 2023
Volume: 40
Número: 1
Páxinas: 40-44
Tipo: Artigo
Outras publicacións en: Revista de toxicología
Resumo
Seabirds can be used as bioindicators of changes in the environment in which they live, identifying different biomarkers in them, which do not provide information on the quantitative levels of contaminants, but on the subclinical adverse effects that these agents can cause. At the present study, the levels of Malondialdehyde (MDA) and glutathione-S-transferase (GST) activity in liver and kidney samples of 30 gannets (Morus bassanus) from the coast of Galicia have been determined, as suitable biomarkers of oxidative stress on birds. In addition, the influence of two endogenous factors (sex and age) on the levels of these biomarkers has been determined. In the liver, the mean values of MDA were 0.508 ± 0.502 nmol/mg protein, while in kidney they were 15.67 ± 12.18 nmol/mg protein. On the other hand, mean GST activity in the liver was 10.93 ± 7.067 nmol/min/mg protein, much lower than the mean activity values found in kidney, which were 62.30 ± 26.97 nmol/min/mg protein. Regarding the variations with respect to age, statistically significant differences were only found in the kidney in GST activity, the activity of this enzyme being higher in adult gannets than in immature ones. Secondly, the gender factor did not influence the levels of any of the biomarkers considered. The obtained results indicate that both biomarkers could be useful in biomonitoring programs of environmental contamination focused on the gannet, although studies that consider a larger number of animals, incorporating a broader range of biomarkers, would be necessary.